Swimfin



FIG. 1 is a top perspective view of a swimfin in accordance with my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is a right side elevation view thereof, the left side elevation being a mirror thereof;

FIG. 5 is a front elevational view thereof; and,

FIG. 6 is a rear elevational view thereof.

The broken lines in the drawings depict portions of the swimfin that form no part of the claimed design. 

CLAIM The ornamental design for a swimfin, as shown and described. 